CofiFab

Song, Peng; Deng, Bailin; Wang, Ziqi; Dong, Zhichao; Li, Wei; Fu, Chi‐Wing; Liu, Ligang

doi:10.1145/2897824.2925876

Cited by 73 publications

(12 citation statements)

References 33 publications

(33 reference statements)

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“…We use a similar setup (see supplemental material). This increases filament adhesion with the help of gravity, in contrast to moving a printer-head around a fixed part (e.g., [Peng et al 2016]). Pan et al [2014] developed a five-axis motion system similar to CNC machining, accumulating materials onto an existing model.…”

Section: Dof Additive Manufacturingmentioning

confidence: 99%

Support-free volume printing by multi-axis motion

et al. 2018

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Section: Dof Additive Manufacturingmentioning

confidence: 99%

Support-free volume printing by multi-axis motion

et al. 2018

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“…Several computational methods have been developed to construct interlocking assemblies for different applications, including puzzles [Song et al 2012;Tang et al 2019;Xin et al 2011], 3D printed objects Yao et al 2017a], laser-cut polyhedrons [Song et al 2016], and furniture Song et al 2017]. Zhang and Balkcom [2016] explored a small set of reusable voxel-like interlocking blocks for building 3D structures, while Wang et al [2018] developed a unified framework to design interlocking assemblies of different forms by leveraging a graph-based representation.…”

Section: Related Workmentioning

confidence: 99%

Design and structural optimization of topological interlocking assemblies

et al. 2019

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We study assemblies of convex rigid blocks regularly arranged to approximate a given freeform surface. Our designs rely solely on the geometric arrangement of blocks to form a stable assembly, neither requiring explicit connectors or complex joints, nor relying on friction between blocks. The convexity of the blocks simplifies fabrication, as they can be easily cut from different materials such as stone, wood, or foam. However, designing stable assemblies is challenging, since adjacent pairs of blocks are restricted in their relative motion only in the direction orthogonal to a single common planar interface surface. We show that despite this weak interaction, structurally stable, and in some cases, globally interlocking assemblies can be found for a variety of freeform designs. Our optimization algorithm is based on a theoretical link between static equilibrium conditions and a geometric, global interlocking property of the assembly---that an assembly is globally interlocking if and only if the equilibrium conditions are satisfied for arbitrary external forces and torques. Inspired by this connection, we define a measure of stability that spans from single-load equilibrium to global interlocking, motivated by tilt analysis experiments used in structural engineering. We use this measure to optimize the geometry of blocks to achieve a static equilibrium for a maximal cone of directions, as opposed to considering only self-load scenarios with a single gravity direction. In the limit, this optimization can achieve globally interlocking structures. We show how different geometric patterns give rise to a variety of design options and validate our results with physical prototypes.

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“…Chen et al [16] , cater to printing efficiency problem, decomposed model into parts and packed them in the printing volume so all the parts could be produced in one pass. Song et al [11] built coarse internal base structures within the given 3D object and attach thin 3D-printed parts onto the base to recover the fine surface details. Wang et al [17] improved overall surface quality by decomposing and optimizing the printing directions of each part to avoid the staircase effect that harms surface quality.…”

Section: Model Decompositionmentioning

confidence: 99%

Near support-free multi-directional 3D printing via global-optimal decomposition

Gao

Yan

et al. 2019

Graphical Models

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In 3D printing, it is critical to use as few as possible supporting materials for efficiency and material saving. Multiple model decomposition methods and multi-DOF (degrees of freedom) 3D printers have been developed to address this issue. However, most systems utilize model decomposition and multi-DOF independently. Only a few existing approaches combine the two, i.e. partitioning the models for multi-DOF printing. In this paper, we present a novel model decomposition method for multi-directional 3D printing, allowing consistent printing with the least cost of supporting materials. Our method is based on a global optimization that minimizes the surface area to be supported for a 3D model. The printing sequence is determined inherently by minimizing a single global objective function. Experiments on various complex 3D models using a five-DOF 3D printer have demonstrated the effectiveness of our approach.

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CofiFab

Cited by 73 publications

References 33 publications

Support-free volume printing by multi-axis motion

Support-free volume printing by multi-axis motion

Design and structural optimization of topological interlocking assemblies

Near support-free multi-directional 3D printing via global-optimal decomposition

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